15 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Deep River | 1 | 2,070 | 2,054 | -0.19% | 59 | 35 | Township |
| Standish | 2 | 1,675 | 1,681 | -0.48% | 61 | 28 | Township |
| Standish | 3 | 1,453 | 1,462 | -0.07% | 667 | 2 | City |
| Moffatt | 4 | 1,160 | 1,162 | -0.34% | 37 | 31 | Township |
| Sims | 5 | 976 | 984 | -0.51% | 85 | 11 | Township |
| Au Gres | 6 | 959 | 952 | 0.1% | 421 | 2 | City |
| Whitney | 7 | 901 | 906 | -0.55% | 29 | 31 | Township |
| Au Gres | 8 | 879 | 893 | -0.57% | 26 | 33 | Township |
| Arenac | 9 | 864 | 865 | -0.35% | 24 | 36 | Township |
| Adams | 10 | 545 | 556 | -0.91% | 15 | 36 | Township |
| Turner | 11 | 523 | 521 | -0.19% | 17 | 31 | Township |
| Sterling | 12 | 459 | 458 | 0% | 470 | 1 | Village |
| Omer | 13 | 286 | 279 | 0.35% | 253 | 1 | City |
| Twining | 14 | 142 | 142 | 0% | 146 | 1 | Village |
| Turner | 15 | 120 | 120 | 0% | 117 | 1 | Village |
Deep River is the largest city in Arenac County, with a population of 2,070.
Turner is the smallest city in Arenac County, with a population of 120.
There are 15 cities in Arenac County, Michigan.